Remove some 3.6ish type annotations

uncompyle6/main.py

@@ -45,7 +45,7 @@ def _get_outstream(outfile):
 
 def decompile(
     co,
-    bytecode_version: str = PYTHON_VERSION_TRIPLE,
+    bytecode_version = PYTHON_VERSION_TRIPLE,
     out=sys.stdout,
     showasm=None,
     showast={},
@@ -171,7 +171,7 @@ def compile_file(source_path):
 
 
 def decompile_file(
-    filename: str,
+    filename,
     outstream=None,
     showasm=None,
     showast={},

uncompyle6/parsers/reducecheck/and_not_check.py

@@ -3,7 +3,7 @@
 
 def and_not_check(
     self, lhs, n, rule, ast, tokens, first, last
-) -> bool:
+):
     jmp = ast[1]
     if jmp.kind.startswith("jmp_"):
         if last == n:

uncompyle6/semantics/fragments.py

@@ -2276,7 +2276,7 @@ def deparsed_find(tup, deparsed, code):
 #     def test():
 #         import os, sys
 
-#     def get_dups(li: list) -> set:
+#     def get_dups(li: list):
 #         dups = {}
 #         for item in li:
 #             dups[item] = dups.get(item, -1) + 1

uncompyle6/semantics/pysource.py

@@ -1414,7 +1414,7 @@ class SourceWalker(GenericASTTraversal, object):
         self.write("]")
         self.prune()
 
-    def get_comprehension_function(self, node, code_index: int):
+    def get_comprehension_function(self, node, code_index):
         """
         Build the body of a comprehension function and then
         find the comprehension node buried in the tree which may